Java ImageIO Supported Writer isImage(String fileName)

Description

is Image

License

Open Source License

Declaration

public static boolean isImage(String fileName) 

Method Source Code

//package com.java2s;
/*//  w  ww  .java2s .c om
 * Aipo is a groupware program developed by Aimluck,Inc.
 * Copyright (C) 2004-2011 Aimluck,Inc.
 * http://www.aipo.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import javax.imageio.ImageIO;

public class Main {

    public static boolean isImage(String fileName) {
        if (fileName == null || "".equals(fileName)) {
            return false;
        }

        int index = fileName.lastIndexOf(".");
        if (index < 1) {
            return false;
        }

        String fileType = getFileTypeName(fileName);

        String[] format = ImageIO.getWriterFormatNames();
        int len = format.length;
        for (int i = 0; i < len; i++) {
            if (format[i].equals(fileType)) {
                return true;
            }
        }
        return false;
    }

    public static String getFileTypeName(String fileName) {
        if (fileName == null || "".equals(fileName)) {
            return null;
        }

        int index = fileName.lastIndexOf(".");
        if (index < 1) {
            return null;
        }

        return fileName.substring(index + 1, fileName.length());
    }
}

Related

1. getImageFormats()
2. isImg(String format)
3. printImageFormatNames()
4. supportedSendTypes()